/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/HierarchyEditor/NiagaraHierarchyViewModelBase.h
General purpose delegate for when sections change
[FOnSectionsChanged](API\Plugins\NiagaraEditor\ViewModels\HierarchyEditor\FNiagaraHierarch-_9\FOnSectionsChang-) & OnSectionsChanged()